This commit improves maintenance requests management through a better
integration of activities and addition of automated activities. Several
things are done in this commit :
* automatic activities generation is added for maintenance requests.
Activities are generated to remind assigned users about maintenance to
perform. They are also automatically removed or updated if the scheduled
date is changed or if the request is done to avoid bloating users with
unnecessary activities;
* a menu to configure activity types is added. Indeed equipment managers
should be able to see and configure activity types related to their job;
Thibault Delavallée
d0e2caee4e